if you don"t want the data in the diagram, you can delete it successfully, add it or enter it, but you can"t render it. May I ask what"s going on? using this.$set (this.value [0], 2, {a 3}) doesn"t work
.this.value = [[{a:1},{a:2},{a:3}],[]]
delete () {
//
this.value[0].splice(2,1)
}
//
add () {
this.value[0].splice(2,1, {a:3})
}